package cn.me;

/**
 * @author jia
 * @date 2021/2/21
 */

/**
 * 死锁：多个线程互相抱着对方需要的资源，然后形成僵持
 */
public class DeadLock {
    public static void main(String[] args) {
        Makeup m1 = new Makeup(0, "小红");
        Makeup m2 = new Makeup(0, "小芳");
        m1.start();
        m2.start();

    }
}

//口红
class Lipstick {


}


//镜子
class Mirror {

}


class Makeup extends Thread {
    //需要的资源只有一份，用static来保证只有一份
    static Lipstick lipstick = new Lipstick();
    static Mirror mirror = new Mirror();
    int choice;//选择
    String girName;//使用化妆品的女人；

    Makeup(int choice, String girName) {
        this.choice = choice;
        this.girName = girName;
    }

    @Override
    public void run() {
        //化妆
        try {
            makeup();
        } catch (InterruptedException e) {
            e.printStackTrace();
        }
    }

    //化妆，互相持有对方的锁，就是需要拿到对方的资源
    private void makeup() throws InterruptedException {
        if (choice == 0) {
            synchronized (lipstick) {//获得口红的锁
                System.out.println(this.girName + "获得口红的锁");
                Thread.sleep(1000);

            }
            synchronized (mirror) {//一秒钟后要获得镜子
                System.out.println(this.girName + "获得镜子的锁");
            }
        } else {
            synchronized (mirror) {//获得口红的锁
                System.out.println(this.girName + "获得镜子的锁");
                Thread.sleep(2000);

            }
            synchronized (lipstick) {//一秒钟后要口红
                System.out.println(this.girName + "获得口红的锁");
            }
        }
    }
}